I third Dumpling Inn, however, since you requested No. Co., I would recommend Panda Garden in San Marcos. It's at the corner of San Marcos Blvd. & Rancho Santa Fe Rd. (next to CVS). Not much to the small strip mall and the front of the restraunt looks a little "shady" but once you open the front door, it is small but quaint and well lit. The potstickers take a little time which to me was a good sign that they were going to be good...and they were very good. Sorry they don't have a website...but check out Yelp for pictures partons took of the menu...fairly standard on the other food.